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Finding the Fourth Proportional to 660,993.21, 912,176.37 and 359,187.21

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Solution

The fourth proportional to 660,993.21, 912,176.37 and 359,187.21 is: 495,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,993.21 : 912,176.37 = 359,187.21 : x
  2. Step 2: Convert to fraction form
    660,993.21/912,176.37 = 359,187.21/x
  3. Step 3: Cross multiply
    660,993.21x = 912,176.37 × 359,187.21
  4. Step 4: Simplify right side
    660,993.21x = 327,642,085,368.23
  5. Step 5: Solve for x
    x = 327,642,085,368.23/660,993.21
  6. Step 6: Final answer
    x = 495,681.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.